How build a cost-effective device that automatically clears exhaust fumes out my garage? Answered
Soon I'm going to move into a building which shares living quarters with a garage. I'd like to rig up some sort of relay-triggering device that opens a nicely sealed set of vents (one intake, one output) and activates a fan exhausting garage air - one that activates the minute I open the garage door, and then continues exhausting fumes for a few minutes after I drive the car away (and close the garage door). After those couple of minutes, the fan would stop, and the vents seal shut
Due to the "lay of the land" (garage right off a busy road, with very short hidden driveway) I will be backing the car in, so exhaust gases will be concentrated at the back of the garage (close to living areas) - rather than near the open garage door. And as my car has a turbocharger, I often need to let it idle for a minute or two ( to let the turbo cool down) before turning it off to park. So it would be most useful to be expelling those exhaust fumes out of the garage!
The question is - what's really the most simple and cost-effective platform for this kind of a system? Could a 555 timer, a few discrete components and some relays do the job elegantly? Or am I better off just diving into Arduino-Land??
Any related ideas (solenoid-closed vents, efficient fans, ducting through walls, etc ) that are especially thrifty - would also be greatly appreciated!!!